JOHN - A Knowledge Representation Language

Class

A class is type or thing in the microworld. Each object in the microworld belongs to a certain class. Class is an Object Oriented Programming terminology.

A class has a name, and may have properties, qualifications, actions, and goals defined.

A class in JOHN language is defined by the create command.

For instance, in the Chess sample microworld, Piece and Player are two examples of classes. A Player class has two instantiated objects: White and Black. The Player object has a win goal, and knows how to do a move action.

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